Resilient abrasive blanket



Nov. 7, 1939. c. B. SCHNEIBLE 2,178,728

RESILIENT ABRASIVE BLANKET Filed Oct. 27, 1937 Patented Nov. 7, 1939 UNETED STATS 3 Claims.

This invention relates to a resilient abrasive blanket or stop. The invention may obviously, however, be applicable to other uses.

An object of the invention is to provide a resilient blanket or stop of simple construction which can be securely anchored to a wall or supporting plate, the resiliency of the blanket being increased by the specific conformation of the rear side of the blanket. A further object is to provide a resilient blanket of special construction by which the resiliency of the structure is increased and its resistance to wear by abrasive blasting considerably prolonged. Other specific objects and advantages will appear as the specification proceeds.

The invention is illustrated in a preferred embodiment, by the accompanying drawing, in which Figure 1 is a broken plan view of the rear side of the blanket or stop embodying my invention; Fig. 2, a transverse sectional view, the section being taken as indicated at line 2 of Fig. 1, the section also illustrating the metal plate to which the blanket is secured by rubber rivets; Fig. 3, a transverse sectional View, the section being taken as indicated at line 3 of Fig. 1, the metal plate support being removed; and Fig. 4, a transverse sectional view similar to Fig. 3 showing a modified form of the invention.

In sand and other abrasive blasting operations, it is found that the back stop plates or walls wear away rapidly under the force of the abrasive. A resilient wall is more effective than metal, but tends after some time to wear under the constant application of the abrasive. I have found that the life of the resilient wall can be greatly increased and its resistance to the abrasive increased by forming the rear side of the blanket with a number of spaced concavities which increase the elasticity or resiliency of the blanket. At the same time, I prefer to employ ridges between the concavities so that the blanket can be firmly anchored to a metal back plate or other suitable support.

In the illustration given, the blanket A of rubber or other suitable resilient material is provided with a number of spaced. concavities ill, the spaces between the concavities forming ridges or plateaus II. The concavities iii are formed in the rear side l2 of the blanket, the front side l3 being preferably even.

In order to secure the blanket rigidly and firmly to a metal plate or the like forming the rear wall for the blasting chamber, I provide the ridges or plateaus H with rivet holes 14, the rivet holes extending about halfway through the blanket.

The modification shown in Fi 4 is substantially the same as that already described except that the blanket B is provided with spaced knobs or projections l5 instead of concavities.

In the use of the device, I apply the blanket to a wall or metal plate, as desired. When the blanket is in position, I form a slit in the front of the blanket aligned with each of the holes It so as to be able to pass a screw or rivet or other suitable fastening device through the slit and the aligned hole M. It will. be observed that with this construction, any suitable fastening means can be employed for passing through the slit and hole and into the retaining board or plate or wall. As illustrated in Fig. 2, a metal plate provided with perforations aligned with the holes I4 may be employed and rubber rivets I l may be passed through the blanket and plate to secure the blanket to the plate as described more fully in my co-pending application, Serial No. 171,390 for Resilient rivet and method of securing resilient blanket to support. Other securing means will, however, be found satisfactory.

When the blanket is then supported upon a wall or plate or board to provide the background for the abrasive operations, it is found that the blanket, yielding as it does under the influence of the thinner portions formed by the concavities, refiects the abrasive grains much more readily so that there is less tendency for the blanket to wear. The rivet holes I l serve the double function of increasing the flexibility of the ridge or plateau portions l 1, While at the same time providing spaces for the rivets or other fastening means employed. The ridge or plateau portions ll provide a firm regular surface for receiving the rivets or the like so as to provide a solid anchor against the plate, etc.

While in the foregoing description, I have set forth one illustrative example of the invention, it will be understood that many changes in the details of construction may be made without departing from the spirit of my invention. The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of the prior art.

I claim:

1. An abrasive stop of the class set forth adapted to be applied to a rigid support, said stop comprising a resilient blanket having an even front surface and an even rear surface adapted to lie against the support and provided with dished concavities, the areas between the concavities being provided with openings to provide attachment to said support and providing substantially non-yielding bases lying against said support.

2. An abrasive stop of the class set forth adapted to be attached to a support, said stop comprising a resilient blanket having an even front surface and a rear surface even throughout except as to spaced circular concavities, the even areas between said concavities providing CLAUDE B. SCHNEIBLE. 

